Seachem

Seachem Laboratories Reef Kalkwasser

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Reef Kalkwasser™ is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide is used to prepare limewater (kalkwasser) solutions that will maintain calcium concentrations at natural seawater levels. Kalkwasser solutions maintain calcium directly and carbonate alkalinity indirectly. However, its capacity to perform these functions is dependent on evaporation rate and CO2 concentration. If these two factors are insufficient you can provide additional calcium with Reef Advantage Calcium™, Reef Complete™, or Reef Calcium™, and carbonate alkalinity with Reef Builder™ or Reef Carbonate™ (do not mix these directly with a kalkwasser solution).

While Reef Kalkwasser™ is a high purity and economical limewater mix, the beginner, or someone with not as much time to devote to their system, may prefer to use other less involved methods for maintaining proper ionic concentration levels.

Directions for use:
Never add this product directly to the tank. Add 3 g (1 teaspoon) to 4 L (1 US gallon) of water and mix to dissolve. If using pure water, a fully saturated solution is prepared by adding 6 g (2 teaspoons) to 4 L (1 US gallon). Drip this solution into tank. Monitor pH and carbonate alkalinity. Adjust rate of addition to maintain a stable pH (8.3–8.4). Notes: Adding 4 L (1 US gallon) of a saturated kalkwasser solution to 150 L (40 US gallons) will raise calcium by 24 mg/L. Always use the clear supernatant (top solution) only and do not allow undissolved material to enter the aquarium. Keep this container tightly closed when not in use and minimize solution/air contact to avoid calcium carbonate formation/precipitation.


Product Manuals & Documentation

Seachem Laboratories Reef Kalkwasser

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

Seachem
Seachem Laboratories, Inc. was established in 1980 by Dr. Leo G. Morin. Seachem moved into a state of the art 110,000 square foot facility in Madison, Georgia marking their 25th anniversary in the industry in 2005. This facility includes production and research laboratories, manufacturing, inventory, shipping, and office space.

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Overall, others give this:

  • 4.6

14 Reviewers (100%) would recommend this

Overall Rating:

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5
5.0
great product

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PROS
Makes life easy.
CONS
none
REVIEW
This was my first time using Kalk and I wont go back. I like low tech when possible so I mix this up in two quart batches which last me four days in a gravity drip. My corals look great! My pH is great. My chemistry is great. Sooooo easy and fool proof.
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5
5.0
Work well in Kali Reactor
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PROS
Non clumping and fine grit
REVIEW
Seems to be compairable to Lab grade calicum hydroxide and dissolves easily.
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4
4.0
Quality

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REVIEW
The first thing we noticed was it seems to dissolve much easier than other brands we have tried and most of all it totally leveled out out parameters then we backed way off on useing other dosing materials clearly the corals are showing signs of growth where we were kind of stagnant growth period ve...Read More
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5
5.0
Great product

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REVIEW
Easy to use and able to buy in large sizes. I use in all my makeup water. My system holds about 300 gallons and evaporates 3-5 gallons a day depending on humidity. I have a calcium reactor that needs set up but I will still add a small amount of kalk to makeup water. I believe in using Seachem produ...Read More
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5
5.0
Great product!

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REVIEW
Keeps my calcium levels high and gives my inverts and rock the calcium they need to thrive.
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4
4.0
Works as a good buffer should

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REVIEW
I use 1/2cup of this product a week in my kalkwasser reactor (a must if you're serious about the health of a reef tank) and my pH & calcium levels are as steady as one could hope for. This is very simple to use if you have a kalkwasser reactor, but I wouldn't suggest this product to a beginner a...Read More
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5
5.0
Great product

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REVIEW
One of best additive to riese calcium but be sure of your Mg level as it will make it up
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